Link to BatteryAging -> https://www.dropbox.com/sh/39qs960mh9uruxq/AADcDzfh253zF

Question

Link to BatteryAging -> https://www.dropbox.com/sh/39qs960mh9uruxq/AADcDzfh253zFF9I8FtUZjs3a?dl=0

Use Matlab and send code, thanks! I need this answered ASAP!

ariBttAging-aip has test 4. The archive BatteryAging.zip has test data from NASA on four batteries that underwent repeated charging and discharging. (a) Plot the four trajectories of number of chargings (x-axis) versus the impedance measurement Re (y-axis) (a-axis) y-axls b) Identify the batteries that show a significant upward trend in Re

Explanation / Answer

Impedance analysis and modeling

EIS gives a precise impedance measurement in a wide band of frequencies, thus provides a unique tool for analysis of the dynamical behavior of batteries, which measures the nonlinearities as well as very slow dynamics directly. Fig. 1 shows the impedance spectra of the Li-ion battery at 50% SOC and measured over frequencies ranging from 3 MHz to 2.1 kHz. As shown in the figure, the impedance spectra can be divided into three sections: the high-frequency section, the mid-frequency section and the low-frequency section [19]. In the high-frequency section (>144 Hz), the impedance spectra intersect with the real axis and the point could be represented by an Ohmic resistance. In the low-frequency section .

Identification of the impedance model

Based on the analysis of impedance spectra and the properties

of FOC, The order of the Warburg element is identified from

the impedance spectra. Based

on the structure of the impedance model and the parameter

identified from the impedance spectra, the least-square method is

utilized to identify the remaining parameters in the time domain

with the voltage response of the battery.

As depicted in Fig. 1, the low-frequency section of the impedance

spectra is a straight line with a constant slope. Fig. 4 shows

the impedance spectra of the battery in different SOC states, which

shows that the curvatures of the impedance spectra are almost the

same. The low-frequency section curves almost overlap each other,

which means the straight lines of the different SOC impedance

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